Describe how you would define the relation Brother-in-Law whose tuples have the form (x, y) with x being the brother-in-law of y. b. Give appropriate relational algebra and SQL expressions that return the relation Brother-in-Law.

Step 1: choose your topics review the project milestone reflections you submitted for modules 1 through 4. choose the one major idea or concept from each module that you feel most applies to your life. in addition, choose an important concept from module 5 that applies to your life. step 2: write your guidebook for each module: write a catchy headline that clearly and concisely sums up your chosen idea or concept write a brief explanation that includes a description of the concept, why it is important, and how it can be applied to your life to make a positive impact choose an exciting, powerful, or engaging image that illustrates your concept remember, you are writing one for each module, so you will have a total of five headlines, five descriptions, and five images. step 3: design your guidebook choose a format to present your digital guidebook. there are many 21st century tools available for creating and submitting your work in the online environment. for more information on tools your school uses, contact your instructor or visit the web 2.0 tools area.

3. bob is arguing that if you use output feedback (ofb) mode twice in a row to encrypt a long message, m, using the same key each time, it will be more secure. explain why bob is wrong, no matter what encryption algorithm he is using for block encryption (15 points).

The place where the extended axis of the earth would touch the celestial sphere is called the celestial